CFL light bulb efficiency, illustration

CFL light bulb efficiency, illustration

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Credit: ANIMATE4.COM/SCIENCE PHOTO LIBARY

Caption: CFL light bulb efficiency. Illustration showing the energy efficiency of a CFL (compact fluorescent lamp) light bulb. 60% of the electrical energy of this 30 watt light bulb is converted into light, producing 1600 lumens of illumination. 12 watts (40%) is lost as heat. The energy efficiency of CFL light bulbs is several times better than incandescent lamps, but not as great as LED (light-emitting diode) lamps.

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